A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6150-00-419-6008
NSN 5965-01-422-4823
NSN 6650-01-544-5197
NSN 5985-01-566-1594
NSN 7035-01-298-5154
NSN 5985-01-140-0092
NSN 5915-01-203-3283
NSN 6130-00-140-2041
NSN 6220-00-269-3783
NSN 5965-00-735-9315
NSN 6240-01-308-1848
NSN 6150-01-441-2254